Safety Function Of The 702, 706, 802, And 806; 70X And 80X Viewing Head Proof Test Interval; Dependence Of The Pfd On The Proof Test Interval For S706 And S806 - Honeywell 700 User Manual

Safety Function of the 702, 706, 802,
and 806
The 702, 706, 802, and 806 viewing heads do not have a
safety function. They are used to provide flame intensity
information via cables to JB Systems, Inc. Signal Processor
Models 531AC, 531DC, 532AC, 532DC, 700AC, 700DC, and
800 which use Flame Relays to provide a safety function.
3.50E
-05
3.00E
-05
2.50E -05
2.00E -05
PFD
AVG
1.50E -05
1.00E
-05
5.00E
-06
0.00E +00
0
Fig. 28. Dependence of the PFD
HONEYWELL MODEL 700/800 SIGNAL PROCESSOR AND VIEWING HEAD
S706 AND S806 PFD
1 2 3 4
AVG
70x and 80x Viewing Head Proof Test
Interval
The proof test must be conducted every 1 to 5 years. This
range is given to allow for the test to be performed during the
normally scheduled burner shutdown period. It is the
responsibility of the user to perform the proof test in the
specified time frame.
The following diagrams present the dependence of the
PFD on the proof test interval. The PFD
AVG
the proof test interval increases.
VS TIME
AVG
5 6 7
TIME (YEARS)
on the proof test interval for S706 & S806.
39
increases as
AVG
8 9 10
M35040
66-2069—01